Question

Presence of traces of arsenious oxide ($\mathrm { As } _ { 2 } \mathrm { O } _ { 3 }$) in the reacting gases $\mathrm { SO } _ { 2 }$ and $\mathrm { O } _ { 2 }$ in presence of platinised asbestos in contact acts as

• A. Catalytic promoter
• B. Catalytic poison
• C. Dehydrating agent
• D. Drying agent

Answer 1

Answer: (B)

Catalytic poison

Answer 2

The presence of traces of $\mathrm { As } _ { 2 } \mathrm { O }$in the reacting gases reduces the activity of platinised asbestos which is used as catalyst in contact process.